.modal {
	display: none; /* 隐藏弹窗 */
	position: fixed;
	z-index: 1;
	left: 0;
	top: 0;
	width: 100%;
	height: 100%;
	overflow: auto;
	background-color: rgb(0,0,0);
	background-color: rgba(0,0,0,0.4);
  }

  .modal-content {
	background-color: #fefefe;
	margin: 15% auto;
	padding: 20px;
	border: 1px solid #888;
	width: 80%;
  }

  .close {
	  color: #aaa;
	float: right;
	font-weight: 150;
	font-size: 24px;
	cursor: pointer;
  }

  .close:hover,
  .close:focus {
	color: black;
	text-decoration: none;
	cursor: pointer;
  }